PS/1 PS/2 PC Memory Reference

PS/2 Memory Reference

PS/2 SIMM-Memory SYSTEM-BOARD Matrix

Type Mod. Mod. Mod. Mod. # # # # # # # #

8590 XP 085 06 07

8590 XP 0H5 0H9 14 15 16 22 23 24

8590 XP 0G5 0G9 0JX 0KX 06 07 14 15 16 22 23 24

8590 XP 0MX 25 26

8595 XP 0H9 0HF 14 15 16 22 23 24

8595 XP 0G9 0GF 0JX 0KX 06 07 14 15 16 22 23 24

8595 XP 0MX 25 26

8642 71 72

9585 0X6 0XA 0XF 06 07 14 15 16 22 23 24

9595 P 22 38 39

9595 ECC 25 26 46

#-Reference / Memory Specifications

Pin 72 to Pin 70, 69, 68 and 67 ( X = connected to GND)
For more details see Memory-Presence Determination

`#`	`Type`	`FRU P/N`	`MFG P/N`	`OPT P/N`	`Size`	`nS`	`Key`
`06`	`P`	`90X8624`	`68X6065` `68X6245` `65X6264` `23F9173` `23F9233`	`6450603`	`1M`	`85`	`X..X`
`07`	`P`	`92F0104`	`68X6127` `4195816` `6450604` `65X1309` `65X5804` `65X6170` `65X6197` `65X6249` `0701600` `65X2429` `82F5506`	`6450604` `92G7196`	`2M`	`85`	`X.X.`
`14`	`P`	`92F0103` `15F7658`	`65F5806` `65X6198` `65X5806`	`6450608`	`2M`	`80`	`.XX.`
`15`	`P`	`92F3337`	`68X6343` `63X6384`	`87F9977` `92G7199`	`4M`	`80`	`XXXX`
`16`	`P`	`64F3607`	`68X6344`	`6450129` `92G7428`	`8M`	`80`	`.XXX`
`22`	`P`	`92F0102` `64F3604`	`71F7008` `87F5041`	`6450902` `92G7198`	`2M`	`70`	`..XX`
`23`	`P`	`92F0105`	`71F7010` `64F3605` `31F2314` `40G6055` `78G9176`	`6450128` `92G7200`	`4M`	`70`	`X.XX`
`24`	`P`	`64F3606`	`71F7011` `78G9177`	`6450130` `92G7202`	`8M`	`70`	`.X..`
`25`	`ECC`	`92F0097`	`42G3072`	`6451158`	`4M`	`70`	`X.XX`
`26`	`ECC`	`92F0098`	`42G3073` `74G1105`	`6451159` `92F7208`	`8M`	`70`	`.X..`
`38`	`High-Rel.`	`71G6203`			`4M`	`70`	`X.XX`
`39`	`High-Rel.`	`71G6204`			`8M`	`70`	`.X..`
`46`	`ECC`	`96F9100`	`42G3237`	`92G7209`	`16M`	`70`	`.X.X`
`71`	`ECC`	`06H7761`			`16M`	`60`
`72`	`ECC`	`06H7762`		`92G2941`	`32M`	`60`

OEM-Memory (Substitute VENDOR SIMMs) Specifications
(for details see also above reference-list and same #)

`#`	`Type`	`FRU P/N`	`OEM Number`	`Size`	`nS`
`07`	`P`	`92F0104`	`MNB36512S85` `THM365120S-85` `MSC2321-85YS18A` `HB56D512361B-8` `1600A53R1466` `9011HCK` `9011HAK` `365120AFG` `TC514256A` `TC51256T 80` `MN4B36512S85` `MN41C42565J` `MNSC2321-85YS18A`	`2MB`	`85`
`14`	`P`	`92F0103`	`A25069180`	`2MB`	`80`
`16`	`P`	`64F3607`	`MSC2351-8AYS24AIB-7`	`8MB`	`80`
`22`	`P`	`92F0102`	`THM365120ASG-70` `HM365120ASG-70` `KMM536512BG-7` `MSC2321-70YSI6A`	`2MB`	`70`
`23`	`P`	`92F0105`	`94-VOHB56D00136IB-7`	`4MB`	`70`

Memory-Presence Determination

SIMMs that are not clearly labeled cannot be identified other than by part number.

(For MEMORY component define, you will have the need to know about 70 or more timing/temperature parameters. Because this information will not fit on a SIMM normally only P/N / Speed and Size is printed on a small Label).

SIMM Identification (Single Inline Memory Module)
72-pin memory SIMMs are usually marked with a label that shows the size and speed (e.g. 1Mx32, 60ns). To determine the SIMM capacity from the above example, divide 32-bits by 8 (1-byte) and multiply this result by 1M, hence, SIMM = 4MB (SIMMs prefix -6R = RAS max. 60ns and Reduced CAS-timing (-2ns) appr. CAS = 19ns)
XMx32 is Non parity and XMx36 is Parity .

PS/2 72-Pin SIMMs (for M/T 85xx/95xx)
A set of 4-Bits shows the state of the presence detect signals for a specific memory connector. The setting of the presence-detect bits is determined through registers (x'00E8' and x'00E9').

Not all of the following Memory-modules are supported by every IBM computer.

Pin 72 to Pin 70, 69, 68 and 67 ( X = connected to GND)

Presence-Detect Bits table

`Bits.` `3 2 1 0`	`Measure` `-ment`	`Single Inline Memory - Module Definition`
`1101`	`..X.`	`32MB 60-ns Industry standard`
`1001`	`.XX.`	`32MB 70-ns Industry standard`
`0101`	`X.X.`	`32MB 80-ns Industry standard`
`1110`	`...X`	`16MB 60-ns Industry standard`
`1010`	`.X.X`	`16MB 70-ns IBM and Industry standard`
`0110`	`X..X`	`16MB 80-ns Industry standard`
`1011`	`.X..`	`8MB 70-ns IBM and Industry standard`
`1000`	`.XXX`	`8MB 80-ns IBM and Industry standard`
`1000`	`.XXX`	`4MB 70-ns Industry standard`
`0100`	`X.XX`	`4MB 70-ns IBM`
`0100`	`X.XX`	`4MB 80-ns Industry standard`
`0000`	`XXXX`	`4MB 80-ns IBM`
`1001`	`.XX.`	`2MB 70-ns Industry standard`
`1100`	`..XX`	`2MB 70-ns IBM`
`0101`	`X.X.`	`2MB 80-ns Industry standard`
`1001`	`.XX.`	`2MB 80-ns IBM`
`0101`	`X.X.`	`2MB 85-ns IBM`
`1110`	`...X`	`2MB 100-ns IBM`
`1010`	`.X.X`	`1MB 70-ns Industry standard`
`0110`	`X..X`	`1MB 80-ns Industry standard`
`0110`	`X..X`	`1MB 85-ns IBM`
`0010`	`XX.X`	`1MB 100-ns IBM`
`1111`		`Connector is empty`

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